How to Reconstitute a Research Peptide (Step-by-Step)

Reconstituting a research peptide means dissolving the lyophilized (freeze-dried) powder into a liquid so it can be measured and used in the laboratory. The standard diluent is bacteriostatic water (sterile water with 0.9% benzyl alcohol) or sterile water. For laboratory research use only — not for human or veterinary use.

What you need

• The lyophilized peptide vial, brought to room temperature
• Bacteriostatic or sterile water as the diluent
• A sterile syringe and alcohol wipes

Step-by-step

1. Bring to room temperature. Cold vials can cause condensation.
2. Sanitize. Wipe both vial stoppers with an alcohol swab.
3. Measure your diluent. Determine the volume of bacteriostatic water for your target concentration (see the math below).
4. Add slowly. Inject the water down the inside wall of the vial, not directly onto the powder.
5. Swirl, do not shake. Gently rotate until dissolved; shaking can shear and degrade the peptide.
6. Inspect. The solution should be clear. Refrigerate after reconstitution.

Concentration math

Concentration = peptide mass ÷ diluent volume. For example, adding 2 mL of bacteriostatic water to a 10 mg vial gives 5 mg/mL (5,000 mcg/mL); adding 1 mL gives 10 mg/mL. Choose the diluent volume that makes your research measurements convenient.

After reconstitution

Store the reconstituted solution refrigerated at 2–8 °C, protect from light, and avoid repeated freeze-thaw cycles. Bacteriostatic water contains a preservative that supports multi-day refrigerated storage of reconstituted solutions. See the full peptide storage & handling guide.

Related

Browse the research peptide catalog, or read about BPC-157 and TB-500.

References

1. Bacteriostatic Water for Injection, USP — DailyMed (U.S. National Library of Medicine).
2. Hoofnagle AN, et al. Recommendations for the generation, quantification, storage, and handling of peptides. PMC, 2016.

For research use only. Not for human or veterinary use.